PDF malware analysis — malicious · 1343b685d68ee7b4

MALICIOUS

PDF

2.0 KB

MD5: 6fd520bfffbcb2627f79b1aa417b0898 SHA-1: 4f16aa76f85b4fa9122ab244eb4b2555961db873 SHA-256: 1343b685d68ee7b47fb8c0f32afd48b50c548a478dedfbe5902995810d1bef3b

288 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains multiple embedded JavaScript streams that exploit known Adobe Reader vulnerabilities, including CVE-2009-0927 and CVE-2008-2992. These scripts are designed to execute arbitrary code, likely to download and run a secondary malicious payload. The specific JavaScript functions called, such as util.printf and Collab.getIcon, are indicative of exploit kit usage.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (matched in decompressed stream)
Pidief-style multi-CVE JavaScript dispatcher critical CVE likely PDF_PIDIEF_MULTI_CVE_DISPATCH

A single JavaScript body branches on app.viewerVersion and invokes two or more of the canonical Reader sinks (Collab.collectEmailInfo, Collab.getIcon, util.printf with a field-width format string). This is the 2009-2010 Pidief.J multi-exploit landing template: a per-version dispatcher that fires the matching CVE chain for whichever Reader version opens the file.
Multi-CVE Adobe Reader JavaScript exploit kit critical PDF_ADOBE_READER_MULTI_CVE_JS_KIT

One recovered JavaScript stage contains multiple version-gated Adobe Reader exploit branches. This is stronger evidence than independent API keywords: the PDF is selecting old Reader vulnerabilities by viewer version and running heap-sprayed Acrobat JavaScript exploit paths.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj263984_000.js` `cf05cc5dfd868b4e0b1b06180b44c9466c6d9ec17cd86e40065c14277de644fd`	pdf-javascript-stream	PDF /JS object 263984 at offset 0x197	2241 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`javascript_obj263985_001.js` `f422ab88264e52dcdcafabd542b6aeba0b067ae42716c53b02aab65f84e6665b`	pdf-javascript-stream	PDF /JS object 263985 at offset 0x58B	155 bytes
`javascript_obj263986_002.js` `71c0b15951013350c915474e87cbe6660a4814e8f04560d975f6731794d5f617`	pdf-javascript-stream	PDF /JS object 263986 at offset 0x65E	514 bytes
`combined_document_js_000.js` `0611c8de5fa890f3f99765095a81d16415cfcdda13d6f1b56b1b13a562e24f82`	deobfuscated-js	combined document JavaScript streams at offset 0x197	2912 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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